1BSON::Double(3) User Contributed Perl Documentation BSON::Double(3)
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6 BSON::Double - BSON type wrapper for Double
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9 version v1.12.1
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12 use BSON::Types ':all';
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14 my $bytes = bson_double( $number );
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17 This module provides a BSON type wrapper for a numeric value that would
18 be represented in BSON as a double.
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21 value
22 A numeric scalar (or the special strings "Inf", "-Inf" or "NaN"). This
23 will be coerced to Perl's numeric type. The default is 0.0.
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26 TO_JSON
27 Returns a double.
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29 If the "BSON_EXTJSON" environment variable is true and the
30 "BSON_EXTJSON_RELAXED" environment variable is false, returns a hashref
31 compatible with MongoDB's extended JSON
32 <https://github.com/mongodb/specifications/blob/master/source/extended-
33 json.rst> format, which represents it as a document as follows:
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35 {"$numberDouble" : "42.0"}
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37 If "BSON_EXTJSON" is false and the value is 'Inf', '-Inf' or 'NaN'
38 (which are illegal in regular JSON), then an exception is thrown.
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41 Some Perls may not support converting "Inf" or "NaN" strings to their
42 double equivalent. They are available as functions from the POSIX
43 module, but as a lighter alternative to POSIX, the following functions
44 are available:
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46 · BSON::Double::pInf() – positive infinity
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48 · BSON::Double::nInf() – negative infinity
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50 · BSON::Double::NaN() – not-a-number
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53 The numification operator, "0+" is overloaded to return the "value",
54 the full "minimal set" of overloaded operations is provided (per
55 overload documentation) and fallback overloading is enabled.
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58 · David Golden <david@mongodb.com>
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60 · Stefan G. <minimalist@lavabit.com>
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63 This software is Copyright (c) 2019 by Stefan G. and MongoDB, Inc.
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65 This is free software, licensed under:
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67 The Apache License, Version 2.0, January 2004
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71perl v5.30.0 2019-08-14 BSON::Double(3)